NO823840L - SHIP PROPELLER WITH TWO OR MORE THROUGH HOLE BLADE - Google Patents

SHIP PROPELLER WITH TWO OR MORE THROUGH HOLE BLADE

Info

Publication number
NO823840L
NO823840L NO823840A NO823840A NO823840L NO 823840 L NO823840 L NO 823840L NO 823840 A NO823840 A NO 823840A NO 823840 A NO823840 A NO 823840A NO 823840 L NO823840 L NO 823840L
Authority
NO
Norway
Prior art keywords
propeller
ship
hub
channel
ship propeller
Prior art date
Application number
NO823840A
Other languages
Norwegian (no)
Inventor
Geert Herman Vos
Original Assignee
Noordvos Schroeven Bv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Noordvos Schroeven Bv filed Critical Noordvos Schroeven Bv
Publication of NO823840L publication Critical patent/NO823840L/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
    • C02F3/207—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors with axial thrust propellers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Microbiology (AREA)
  • Organic Chemistry (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Combustion & Propulsion (AREA)
  • Hydrology & Water Resources (AREA)
  • Ocean & Marine Engineering (AREA)
  • Toys (AREA)
  • Catching Or Destruction (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Screw Conveyors (AREA)
  • Wind Motors (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

Den foreliggende oppfinnelse vedrører en skipspropell med to eller flere hule, gjennomhullede blader som er montert på The present invention relates to a ship's propeller with two or more hollow, perforated blades mounted on it

et nav utformet med en kanal.a hub designed with a channel.

Hollandsk patentsøknad 76.01422 omhandler en skipspropell med hule blader montert rundt et nav, hvor bladene er utformet med hull på trykksiden eller på suge- eller lesiden, og hvor hvert blad dessuten via en tilsvarende kanal i navet står i forbindelse med drivakselen, som navet er montert rundt og som like ens er utformet hul. Den hule akselen står på sin side i forbindelse med en kilde inneholdende et gassformet, flytende eller pulverformet materiale. Dutch patent application 76.01422 relates to a marine propeller with hollow blades mounted around a hub, where the blades are designed with holes on the pressure side or on the suction or reading side, and where each blade is also connected via a corresponding channel in the hub to the drive shaft, on which the hub is mounted round and which are equally shaped hollow. The hollow shaft is in turn connected to a source containing a gaseous, liquid or powdered material.

Når en slik skipspropell inngår som del i et skips fremdriftsmekanisme, vil den under rotasjon, enten som følge av over-trykk eller under innvirkning fra sugeeffekt frembrakt av propellen under rotasjon, forårsake at de nevnte materialer blir transportert via den hule akselen og kanalene i navet frem til de hule propellbladene, hvor de deretter via hullene i bladene strømmer ut i vannet som omgir propellen og spres i dette. When such a ship's propeller forms part of a ship's propulsion mechanism, during rotation, either as a result of overpressure or under the influence of the suction effect produced by the propeller during rotation, it will cause the aforementioned materials to be transported via the hollow shaft and the channels in the hub up to the hollow propeller blades, where they then flow out via the holes in the blades into the water surrounding the propeller and are dispersed in it.

Et formål med oppfinnelsen har vært å komme frem til en skipspropell av det slag som er angitt innledningsvis, hvor propellen har en forbedret virkningsgrad med hensyn til fremdrifts-mekanismen. One purpose of the invention has been to arrive at a ship propeller of the type indicated at the outset, where the propeller has an improved degree of efficiency with regard to the propulsion mechanism.

I overensstemmelse med oppfinnelsen er det skaffet til veie en skipspropell som utmerker seg ved at hvert blad er gjen-nomhullet ved sin leside og via en kanal gjennom navet står i forbindelse med propellens trykkside. In accordance with the invention, a ship's propeller has been provided which is distinguished by the fact that each blade is pierced at its lee side and is connected to the pressure side of the propeller via a channel through the hub.

Under rotasjonen av skipspropellen ifølge oppfinnelsen, som er montert omkring en vanlig massiv aksel, eller i hvert fall en aksel hvorigjennom det ikke slippes noen materialer frem til hulrommene i propellbladene under rotasjon, strømmer det vann fra området ved propellens trykkside via kanalen gjennom navet til hulrommet i det tilsvarende propellblad og deretter via hullene til området ved propellens leside. Det har vist seg at denne resirkulasjon av vann ledsages av en betydelig forbedring av virkningsgraden ved propellens drift som er avhengig av rotasjonshastigheten og som gir seg uttrykk i brennstoff-forbruk, skipets hastighet og trekkraft. During the rotation of the ship's propeller according to the invention, which is mounted around an ordinary solid shaft, or at least a shaft through which no materials are released to the cavities in the propeller blades during rotation, water flows from the area on the pressure side of the propeller via the channel through the hub to the cavity in the corresponding propeller blade and then via the holes to the area at the lee side of the propeller. It has been shown that this recirculation of water is accompanied by a significant improvement in the efficiency of the propeller's operation, which is dependent on the rotation speed and which is expressed in fuel consumption, the ship's speed and traction.

Ved en utførelsesform av propellen ifølge oppfinnelsen, som på fordelaktig måte bidrar til å forbedre virkningsgraden ved propellens drift, strekker hver kanal gjennom navet ved propellens trykkside seg stort sett parallelt med omdreiningsaksen. In an embodiment of the propeller according to the invention, which advantageously contributes to improving the efficiency of the propeller's operation, each channel extends through the hub on the pressure side of the propeller largely parallel to the axis of rotation.

Ved en effektiv utførelsesform er hullene ved propell-bladenes leside plassert parallelt med hundekurven og, sett i propellens rotasjonsretning, like bak denne. Det innrømmes at et slikt trekk er i og for seg kjent fra hollandsk patentsøknad 78.03906, som imidlertid vedrører en propell, hvor et gassformet, pulverformet eller flytende materiale dispergeres i en væske ved anvendelse av imploderende hulrom. Foreliggende oppfinnelse vedrører derimot en propell som tjener til fremdrift av et skip. In an efficient embodiment, the holes on the leeward side of the propeller blades are placed parallel to the dog curve and, seen in the direction of rotation of the propeller, just behind it. It is admitted that such a feature is known per se from Dutch patent application 78.03906, which however relates to a propeller, where a gaseous, powdery or liquid material is dispersed in a liquid by the use of imploding cavities. The present invention, on the other hand, relates to a propeller which serves to propel a ship.

Det har blitt eksperimentelt slått fast ved praktiske for-søk med et skip at en propell ifølge oppfinnelsen som hadde tre blader, under sammenliknbare forhold, resulterte i en betydelig forbedring i fremdrifts-virkningsgraden sammenliknet med en iden-tisk propell uten hull i bladene og uten kanal i propellnavet. Forbedringen i virkningsgrad under de valgte forhold ved for-søkene var avhengig av propellens omdreiningshastighet for så vidt som virkningsgraden, etter å ha passert en maksimal verdi, minsket når hastigheten ble ytterligere økt. I området 250-350 omdreininger pr. minutt målt ved skipets hastighet kunne det fastslås en forbedring på ca. 8-6% med propellen ifølge oppfinnelsen, målt ved trekkraft en forbedring på ca. 39-16%, og når brennstoff-forbruk ble medregnet som en funksjon av skipets hastighet, oppviste propellen ifølge oppfinnelsen en forbedring i forhold til en vanlig propell på ca. 7 til 8% i gjennomsnitt. It has been experimentally determined by practical trials with a ship that a propeller according to the invention which had three blades, under comparable conditions, resulted in a significant improvement in propulsion efficiency compared to an identical propeller without holes in the blades and without channel in the propeller hub. The improvement in efficiency under the selected test conditions was dependent on the speed of rotation of the propeller in so far as the efficiency, after passing a maximum value, decreased when the speed was further increased. In the area of 250-350 revolutions per minute measured by the ship's speed, an improvement of approx. 8-6% with the propeller according to the invention, measured by traction, an improvement of approx. 39-16%, and when fuel consumption was taken into account as a function of the ship's speed, the propeller according to the invention showed an improvement compared to a normal propeller of approx. 7 to 8% on average.

I det følgende beskrives en utførelsesform av skipspropellen ifølge oppfinnelsen som et eksempel og under henvisning til medfølgende tegning, som viser et aksialriss av propellen ifølge oppfinnelsen sett fra dens leside. In the following, an embodiment of the ship propeller according to the invention is described as an example and with reference to the accompanying drawing, which shows an axial view of the propeller according to the invention seen from its leeward side.

Et hult propellblad 1 er utformet med hull 2 paralleltA hollow propeller blade 1 is designed with holes 2 in parallel

med hundekurven 5. Propellbladet er forbundet med et nav 3 som with the dog curve 5. The propeller blade is connected to a hub 3 which

er utformet med en kanal 4, som setter området ved propellens trykkside i forbindelse med hulrommet i propellbladet. is designed with a channel 4, which puts the area on the pressure side of the propeller in connection with the cavity in the propeller blade.

Den beskrevne og viste skipspropell kan naturligvis modi-fiseres uten å fravike oppfinnelsens rammer. Formen på hullene og antallet av disse, formen på hulrommet i propellbladet og formen og dimensjonene på kanalen gjennom navet kan således til-passes i den hensikt å redusere motstanden mot strømmen av vannet som resirkuleres. The ship propeller described and shown can of course be modified without deviating from the scope of the invention. The shape of the holes and their number, the shape of the cavity in the propeller blade and the shape and dimensions of the channel through the hub can thus be adapted with the aim of reducing the resistance to the flow of the water being recycled.

Claims (3)

1. Skipspropell med to eller flere hule, gjennomhullede blader (1) som er montert på et nav (3) utformet med en kanal (4), karakterisert ved at hvert blad (1) er gjennom-hullet ved sin leside og via en kanal (4) gjennom navet (3) står i forbindelse med propellens trykkside.1. Ship propeller with two or more hollow, pierced blades (1) which are mounted on a hub (3) designed with a channel (4), characterized in that each blade (1) is pierced at its leeward side and via a channel (4) through the hub (3) is connected to the pressure side of the propeller. 2. Skipspropell i samsvar med krav 1, karakterisert ved at hver kanal gjennom navet ved propellens trykkside strekker seg stort sett parallelt med omdreiningsaksen.2. Ship propeller in accordance with claim 1, characterized in that each channel through the hub on the pressure side of the propeller extends largely parallel to the axis of rotation. 3. Skipspropell i samsvar med krav 1 eller 2, karakterisert ved at hullene (2) er plassert parallelt med hundekurven (5) og, sett i propellens rotasjonsretning, like bak denne.3. Ship propeller in accordance with claim 1 or 2, characterized in that the holes (2) are placed parallel to the dog curve (5) and, seen in the propeller's direction of rotation, just behind this one.
NO823840A 1981-11-20 1982-11-17 SHIP PROPELLER WITH TWO OR MORE THROUGH HOLE BLADE NO823840L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8105275A NL8105275A (en) 1981-11-20 1981-11-20 SHIP SCREW, PROVIDED WITH TWO OR MORE PERFORATED HOLLOW BLADES.

Publications (1)

Publication Number Publication Date
NO823840L true NO823840L (en) 1983-05-24

Family

ID=19838424

Family Applications (1)

Application Number Title Priority Date Filing Date
NO823840A NO823840L (en) 1981-11-20 1982-11-17 SHIP PROPELLER WITH TWO OR MORE THROUGH HOLE BLADE

Country Status (14)

Country Link
BE (1) BE895081A (en)
DE (1) DE3242589A1 (en)
DK (1) DK508982A (en)
ES (1) ES275637Y (en)
FI (1) FI823935L (en)
FR (1) FR2516890A1 (en)
GB (1) GB2110307B (en)
GR (1) GR76737B (en)
IE (1) IE53509B1 (en)
IT (1) IT1153059B (en)
NL (1) NL8105275A (en)
NO (1) NO823840L (en)
PT (1) PT75872B (en)
SE (1) SE8206578L (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU708767C (en) * 1997-04-14 2002-08-29 Chi Keung Leung Improved fluid displacing blade
AUPO620197A0 (en) 1997-04-14 1997-05-08 Leung, Chi Keung Extra byte propeller
AU2002355362B2 (en) * 2001-08-08 2005-02-03 Robin David Shaw Cavitation alleviation and line cutting device
GB0222466D0 (en) 2002-09-27 2002-11-06 Marine Current Turbines Ltd Improvements in rotor blades and/or hydrofoils
GB0617828D0 (en) 2006-09-11 2006-10-18 Ambassador Marine Ltd Line cutter
AU2006233263B2 (en) 2006-10-02 2012-05-03 Aon Invent Llc Safety propeller
RU2539870C1 (en) * 2013-09-30 2015-01-27 Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Дальневосточный Федеральный Университет" (Двфу) Propeller screw
CN105221321A (en) * 2014-06-25 2016-01-06 上海电气风电设备有限公司 The open blade structure of ocean current power generation unit inner chamber

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE17146C (en) * FR. WREDE in Duisburg, Crefelderstr. 20 Ship propellers with hollow wings, the cavity of which communicates with the surrounding water
GB191206468A (en) * 1912-03-15 1912-05-23 Wynford Brierley Improvements in Propellers and Fans.
US1604994A (en) * 1925-08-31 1926-11-02 Patrick P Grosso Propeller
US1666517A (en) * 1927-01-25 1928-04-17 Tully Edward Ernest Propelling device for ships
GB291281A (en) * 1927-10-29 1928-05-31 William Lovis Improvements in or relating to ships' propellers
GB400913A (en) * 1932-01-29 1933-11-02 Louis Jauch Improvements in hydraulic or aerial propellers or receivers
GB396716A (en) * 1932-02-08 1933-08-08 Edward Ernest Tully Improvements in or relating to ships' propellers
US2511156A (en) * 1946-08-07 1950-06-13 Richard J Glass Propeller
GB1200162A (en) * 1966-05-24 1970-07-29 Robert Filmer Bridgland Improvements in blades for screw-propellers and lifting rotors
NL7803906A (en) * 1978-04-12 1979-10-16 Noordvos Schroeven Bv METHOD, DEVICE AND PROPELLER FOR DISTRIBUTING A GAS, POWDER OR LIQUID MATERIAL IN A LIQUID.

Also Published As

Publication number Publication date
IT8224301A1 (en) 1984-05-17
SE8206578D0 (en) 1982-11-18
IE822759L (en) 1983-05-20
FR2516890A1 (en) 1983-05-27
SE8206578L (en) 1983-05-21
FI823935L (en) 1983-05-21
IT8224301A0 (en) 1982-11-17
ES275637Y (en) 1984-10-01
PT75872B (en) 1985-01-09
GR76737B (en) 1984-08-30
PT75872A (en) 1982-12-01
GB2110307B (en) 1985-01-30
DK508982A (en) 1983-05-21
ES275637U (en) 1984-03-01
BE895081A (en) 1983-05-24
GB2110307A (en) 1983-06-15
DE3242589A1 (en) 1983-05-26
FI823935A0 (en) 1982-11-17
IT1153059B (en) 1987-01-14
IE53509B1 (en) 1988-11-23
NL8105275A (en) 1983-06-16

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